75071979112545 has 40 divisors (see below), whose sum is σ = 135325280914560. Its totient is φ = 39814710671520.

The previous prime is 75071979112517. The next prime is 75071979112547. The reversal of 75071979112545 is 54521197917057.

75071979112545 is a `hidden beast` number, since 7 + 5 + 0 + 7 + 1 + 9 + 79 + 1 + 12 + 545 = 666.

It is not a de Polignac number, because 75071979112545 - 2²⁰ = 75071978063969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75071979112547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 517701001 + ... + 517845990.

It is an arithmetic number, because the mean of its divisors is an integer number (3383132022864).

Almost surely, 2^{75071979112545} is an apocalyptic number.

It is an amenable number.

75071979112545 is a deficient number, since it is larger than the sum of its proper divisors (60253301802015).

75071979112545 is a wasteful number, since it uses less digits than its factorization.

75071979112545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035547187 (or 1035547178 counting only the distinct ones).

The product of its (nonzero) digits is 27783000, while the sum is 63.

The spelling of 75071979112545 in words is "seventy-five trillion, seventy-one billion, nine hundred seventy-nine million, one hundred twelve thousand, five hundred forty-five".